If your boiler isn’t functioning and/or your water isn’t flowing hot to the hot water outlet, the issue is most likely the result of the pressure of your boiler being too high or too low.
But, there’s an array of possible causes , and in this article we’ll look at the most frequent and most likely solutions.
No hot water coming from combi boiler: The top issues and solutions
When your boiler works but no hot water, here are the most frequently cited reasons particularly if you notice that your heating is operating, but you’ve got no hot water
The most frequent reasons that you do not get hot water coming from your boiler are:
1 – The pilot light is is not illuminated (no flame means there is no hot water)
Boilers use gases (or oil) in order to do this, you need the use of a pilot light.
Pilot lights are small Olympic flames that bear the entire burden of a family’s comfort as well as wellbeing.
In extreme situations, the flame may be sparked or, more often simply fail to get it caught. This can lead to complete failure, which means you’ll receive none of the hot water you expect from your boiler.
For older models, you may be able to observe the light source inside the frame of your boiler however, in advanced boilers, it will be notified of the boiler’s failings via an error message that is displayed on a depressing black and white screen.
Referring to the boiler’s manual, you can try to turn off your pilot lamp.
If this doesn’t work, you’ll require an engineer who can attend to the broken boiler and hopefully, you won’t need to buy a new one.
Fortunately, in the majority of cases it’s an easy fix for yourself and it’s a simple (free) method to restore your boiler’s hot water back.
Cost to repair (and get hot water again):
DIY: £0.00
Engineer: £75-£160
2 – Frozen pipes
If there is no global nuclear disaster it will only apply to winter weather conditions.
Condensate pipes connect our boiler to an exterior wall (or often an inside drain) and permits the removal of water that has been condensed.
Because of the slow drip of the water, and due to the regular nature of physics, it can freeze at times.
When you detect the issue the boiler will stop working to protect you, and give the user no heating or hot boiling water (or heating) even.
Fortunately, this can be repaired at home. You can melt the frozen region by wrapping the pipe in a cloth or pouring warm water on the condensate.
It is necessary to restart your boiler following this issue.
After this the boiler should be able to get its hot water restored.
Cost to repair (and to get your hot water):
DIY: £0.00
Engineer: £50-£150
- Faulty Diverter valve
In every boiler is an inlet valve.
It’s tiny traffic director that controls that water flow as an outcast character from the X-Men.
A malfunction of this device caused through natural system corrosion or the build-up of metallic over time, may only permit hot water to reach your radiators. This will then deplete your hot water supply, resulting in you will not get hot water comes out from the boiler.
Other than a possible error code modification It’s not something you can diagnose at home. A heating engineer is needed.
The ideal scenario is to replace the diverter valve that could cost approximately £200 including labour expenses, however, you must consider the condition and age of your boiler before you throw repairs money at it.
Cost to repair (and get hot water again):
DIY: Unattainable
Engineer: £180-£250
4 . Pressure problems: over or under pressure
The most likely cause is the leak mentioned above, but pressure imbalance or excessively high could cause not having hot water in the combi boiler.
If your boiler is not in pressure, it can typically be fixed with an easy top-up.
A boiler that’s over-pressurized may be fought at home with the simple process of bleeding your radiator, but should that not resolve the issue there’s a broken boiler component that requires the services of a heating engineer or new boiler. This is the reason of your inability to get hot water.
It is also possible to think about a power flush to increase the efficiency of your water heating system and to prevent blockages.
Cost to repair (and get hot water):
DIY: £0.00
Engineer: £50-300
There is no hot water coming from a system or regular boiler: Top reasons
If you are receiving heating, but not boiling water is more probable when you use the system or conventional boiler that is equipped with hot water heater.
1 – Thermostat/timer malfunction
If you’re proficient in your technology or keep an check on your energy consumption and usage, it’s likely that you’ll be using the timer of your boiler to regulate the time it’s running.
A problem with the thermostat will only create a problem in heating, and not hot water.
However, if your thermostat is acting as an alarm, then a flaw that it has caused could result in your boiler shutting off completely, depriving you of hot water , plunge you back into an age where you’re left feeling blind.
Cost to repair (and get hot water):
DIY: £0.00
- Leak from the boiler or pipe
A leaky boiler or pipe is likely to cause the pressure dropping.
This leak can lead to an insufficient pressure of water which can affect the flow of hot water the taps.
The general loss of the boiler’s pressure could be cured by filling your tank with water manually , however if the issue is the result of an issue with the water, it must be dealt with by a specialist.
Cost to repair (and to get your hot water again):
DIY: £0.00
Engineer: £100-300
- Energy source failure Electric or gas
The absence of gas or electricity for the boiler could be the primary reason for the lack of hot water. It could lead to you being classified as a sloppy sausage for Googling the reason why your boiler has stopped working.
This article won’t provide great details on how to determine whether you have electricity or gas however, you should first make sure that other appliances in the vicinity aren’t affected, whether it’s the gas cooker or lights. Also, don’t forget to verify that the boiler is turned on at first.
Cost to repair (and to get your hot water again):
DIY: £0.00 (unless you’ve failed to pay your energy bills)
Engineer: £50-300
- Inadequate water cylinder size
If you’re not receiving hot water from your system or regular boiler, it could be that your cylinder isn’t enough to meet your needs for hot water.
The sizes of cylinders vary widely, with smaller sizes being ideal only for homes occupied by two or more Hobbits with a smaller consumption of hot water.
If you’re a fan of long showers while you rid yourself of the sins of your bad boiler purchase decision , or you’re a household of normal-sized people, then the hot water in your home will go out quickly.
The only solution is to use less hot water or a larger tank.
Cost to repair (and to get hot water):
DIY: Unattainable
Engineer: £500-700 (+ fitting)
Is there no hot water coming in your boiler? Here’s a quick-readers explanation
The absence of hot water coming from your boiler can be caused by various possible causes that can cost anything from nothing to an astronomical amount, according to the firm you contact to solve the problem.
One of the most crucial things to be aware of in the event that you don’t have hot water
1 – If you’re having trouble receiving the hot water you expect from your boiler, investigate every DIY fix you can find (mentioned earlier). After you’ve exhausted these solutions, make sure you know the most likely reasons your boiler isn’t functioning before seeking help from a professional so that you know what are supposed to pay and not what a spanner-wielding snob is planning to charge you on Friday afternoon.
- If your boiler is in need of repairs that are costly, take into consideration the condition of the boiler as well as the possibility of experiencing further problems in the near term.
If the boiler you have is more than 10 years old and has issues caused by corrosion or age for example, a malfunctioning diverter valve or frequent leaks, think about a new boiler.